| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 52b - Paleozoic Plateau/Coulee Section |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 54610 - Alma, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 6 | 12 | 24 | 37 | 49 | 59 | 63 | 61 | 52 | 41 | 27 | 13 | 37 |
| Avg Max Temp (°F) | 23 | 30 | 42 | 57 | 70 | 79 | 83 | 80 | 71 | 59 | 41 | 27 | 55 |
| Avg Precip (In.) | 1.01 | .68 | 1.81 | 3.23 | 3.76 | 4.42 | 5.08 | 4.6 | 3.92 | 2.37 | 2.21 | .98 | 34.07 |